I recently received this interesting idea from a Flexi-Capo user who has kindly allowed me to pass it on to readers of my BLOG.

"...did you know that you can fit a soft rubber bumper to the stops and use the Flexi-Capo as a "Harmonic capo"! I experimented using double sided tape but found 5mm squares of bicycle inner tube worked well and finally attached them with superglue (only put the superglue on the rubber NOT the capo - and use sparingly). Note: YOU DON'T PUSH THE LEVER TO THE "LOCKED POSITION" BUT JUST LET IT TOUCH THE STRING ENOUGH TO RING THE HARMONIC."

Tony Seeger - (take a look at the fabulous Harp Guitars he designs and plays at Seraph Harp Guitars)